Dual velocity stack



FIG. 1 is a perspective view of a dual velocity stack showing ourdesign;

FIG. 2 is a front view of the dual velocity stack shown in FIG. 1;

FIG. 3 is a side view of the dual velocity stack shown in FIG. 1;

FIG. 4 is a top view of the dual velocity stack shown in FIG. 1; and,

FIG. 5 is a bottom view of the dual velocity stack shown in FIG. 1.

The portions of the dual velocity stack shown in broken lines in FIGS. 1-4 form no part of the claimed design.

CLAIM We claim the ornamental design of a dual velocity stack, as shownand described.